Henry augustus pickaei



(No Model.)

H. A. PIOKARD.-

FLOOR OLA-MP.

INO. 306,424

F193, Patented Oct. 14 1884.

Unirnn Starts a'rnn'r @rrrcn.

HENRY AUGUSTUS IICKARD, OF DANVERS, MASS, ASSIGNOR, BY MESNEASSIGNMENTS, TO HIMSELF AND CHARLES N, PERLEY, OF SAME PLACE.

FLOOR CLAMP.

EIFECIFICATION forming part of Letters Patent No. 306,424, dated October14, 1884:.

Application filed September 6, 1884. (No model.)

Be it known that I, HENRY AUe-UsrUs PIUKARD, of Danvers, in the countyof Essex, of the Commonwealth of Massachusetts, have '5 invented a newand useful Improvement in Floor-Olamps; and I do hereby declare the sameto be described in the following 'spcciiication and represented in theaccompanying drawings, of which-v Figure 1 is a top view, Fig. 2 a sideelevation, and Fig. 3

a longitudinal and median section, of a floor-clamp containing myinvention, the nature of which is defined in the claim hereinafterpresented.

In some respects the said floor-clamp is like that described in theUnited States Patent No. 299,220, though differing therefrom materially,as it has two sets of toggles separate from an operative lever, which,fulcrumcd to standards, has in its shorter arm a curved slot to receivethe median joint-pin or roller ot' the toggles.

Furthermore, the. lever has its curved catch rack attached to andextended from the floor board presser, and such leverhas its longer armprojecting toward and over such presser, whereby a person whileoperating the lever is able to stand on the floor-board in order toprevent it from being forced upward off the under floor.

In the drawings, A denotes the floor-board prcsser or block, which isgroovedin its front edge to receive, when against the board, the

tongue thereof. ward from the other, and go loosely through an abutment-Two rods, B 13, extend rear presser A parallel to each block, 0,provided with a series of curved points or spurs, c a c, to enter thelower -boarding of the floor.

Each spur is extended rearward and downward from the lower part of therear edge of the said block 0. A set or pair oftoggles, DD, is jointedto the presser,-another such abutment block,

set, E E. being jointed to the the toggles of each set being jointed attheir inner ends to those of the other, and having on and concentricwith their common joint-pin b a friction-roller, c, to revolve 011 suchpin.- Each of the rods B B extends through one of two arched standards,F F, such standards being permanently fastened to the rod.

Fulorumcd to the said two In using the above-described floor-clamp, the

presser is by the workman to be placed against the tongued edge of theflooring-board to be forced up, such workman standing or having one footon the said board. Next, the workman is toraise the longer arm of thelever, so as to cause the toggles to move upward and draw the toothedabutment toward the presser. Next, the spurs or teeth of the abutmentare to be forced into the floor, after which the workman, standing orhaving one foot on the floor-board to be forced up, is to raise the rackout of engagement with the le ver and draw the longer arm of the leverto ward him. In so doing the presser will be forced forward by thetoggles, and the board will be set up, and may be held so set by thecurved rack catching upon the lever.

I do not herein claim a floor-clamp having its toothed block connectedto a lever by links, and such levcr jointed at its lower end to apresser or block provided with rods extending from it through thetoothed block, all being as represented in the hercinbefore-mentionedpatent.

I claim The combination of the presser, its rods, the toothed block toslide on such rods, the toggles jointed together and to thepresser andtoothed block, the standards erected on the rods, the

slotted lever fulcrumed to the standards and applied, as described, tothe toggles, and the curved rack connected to the presser and extendedthrough the longer arm of the lever, all being arranged substantiallyand to operate as and for the purpose set forth.

HENRY AUGUSTUS PICKARD'.

\Vitnesses:

EDWARD J. Jonas, ANNIE M. (lon'onimx.

